Document
POWER DETECTORS - SMT
v02.0913
Typical Applications
The HMC948LP3E is ideal for: • Point-to-Point Microwave Radio • VSAT • Wideband Power Monitoring • Receiver Signal Strength Indication (RSSI) • Test & Measurement
HMC948LP3E
54 dB, LOGARITHMIC DETECTOR, 1 - 23 GHz
Features
Wide Input Bandwidth: 1 to 23 GHz Wide Dynamic Range: 54 dB up to 23 GHz Single Positive Supply: +3.3V Excellent Stability Over Temperature Fast Rise / Fall Time: 5 / 7 ns 16 Lead 3x3 mm SMT Package: 9 mm²
Functional Diagram
General Description
The HMC948LP3E Logarithmic Detector converts RF signals at its input, to a proportional DC voltage at its output. The HMC948LP3E employs successive compression topology which delivers high dynamic range over a wide input frequency range. As the input power is increased, successive amplifiers move into saturation one by one creating an approximation of the logarithm function. The output of a series of square law detectors is summed, converted into the voltage domain and buffered to drive the LOG OUT output. The HMC948LP3E provides a nominal logarithmic slope of +14.2 mV/dB and an intercept of -111 dBm at 23 GHz. Ideal as a log detector for high volume microwave radio and VSAT applications, the HMC948LP3E is housed in a compact 3x3 mm RoHS compliant SMT plastic package.
Electrical Specifications, TA = +25 C Vcc = +3.3V
Parameter
Typ.
Typ.
Typ.
Typ.
Typ.
Typ.
Typ.
Units
Input Frequency[1]
1
5
10
14
18
20
23
GHz
±3 dB Dynamic Range
53
54
54
55
55
55
55
dB
±3 dB Dynamic Range Center
-23
-25
-24
-22
-20
-15
-15
dBm
Log Error Over Temperature (-40 to +85)
±1
±1
±1
±1.5
±1.5
±1.5
±1.5
dB
Output Intercept
-104
-107
-109
-112
-113
-108
-111
dBm
Output Slope
16.8
16.7
15.9
15.2
14.6
14.4
14.2
mV/dB
[1] Video output load should be 1K Ohm or higher.
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v02.0913
Electrical Specifications, (continued)
Parameter LOGOUT Interface Output Voltage Range Output Rise Time [1] / Fall Time [2] Power Supply (Vcc) Operating Voltage Range Supply Current in Normal Mode [1] 0 dBm Input Pulsed; measured from 10% to 90% [2] 0 dBm Input Pulsed; measured from 90% to 10%
Conditions.